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溢流坝通常设计成曲线型实用堰,而曲线型实用堰又分成真空剖面堰和非真空剖面堰两种。前者是故意将剖面曲线外形略低于溢流水舌下缘,使堰面产生一定真空,从而可得到较大的流量系数,也就增大了泄流量。实际上这种剖面堰在溢流坝设计中却较少应用,而更多地是采用非真空剖面堰。在过去,国内普遍采用克里格—奥菲采洛夫剖面(简称克—奥型剖面),它是根据巴辛矩形薄壁堰的实验资料进行修改,使堰面曲线的
Spillway dam is usually designed as a curved practical weir, and curved utility weir is divided into two kinds of vacuum profile weir and non-vacuum profile weir. The former deliberately profile the profile slightly lower than the lower edge of the overflow tongue, the weir produced a certain vacuum, resulting in a larger flow coefficient, also increased the discharge. In fact, this type of profile weir has less application in spillway dam design, and more is the use of non-vacuum profile weir. In the past, the Krieger-Aofei-Sa-Fu profile (K-Ao profile) has been widely used in China. It is modified according to the experimental data of the Baxin rectangular thin-weir,